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Rare Minerals Specimens

Tuesday, 24 January 2023 04:00 PM

Introducing the "Rare Minerals Specimens" gallery which is part of our New Additions galleries. This gallery contains mineral specimens for sale including thometzekite, titanowodginite, tundrite-(ce), ulrichite, uytenbogaardtite, and wightmanite and more from places like Tsumeb mine, Tsumeb, Namibia, Tanco pegmatite, Bernic Lake, Manitoba, Canada, Kangerdluarssuq, Ilimaussaq, Greenland, Lake Boga granite quarry, Lake Boga, Victoria, Australia, New Bullfrog mine, Nye Co., Nevada, United States, and Crestmore, Riverside Co., California, United States.

Thometzekite

#BAC60749
Locality
Tsumeb mine, Tsumeb, Namibia 
Formula
PbCu2+2(AsO4)2·2H2
Availability
Sold
Size
2.5 x 1.5 x 1.5 cm - Thumbnail 
Tagged
arsenate , copper  
Special Info
Type Locality 

Bluish pearly crystals on unkown platey crystals. Excellent specimen.


Thometzekite

Formula
PbCu2+2(AsO4)2·2H2
Crystal System
Monoclinic 
Luster
Earthy (Dull) 
Color
bluish green, green 
Streak
white 
Class
Monoclinic - Prismatic 
Hardness
4-5 
Collection
William & Anne Cook Collection
Special Info
Type Locality

Titanowodginite

#BAC60762
Locality
Tanco pegmatite, Bernic Lake, Manitoba, Canada 
Formula
Mn2+TiTa2O8 
Availability
Sold
Size
2.5 x 1.5 x 1.2 cm - Thumbnail 
Tagged
pegmatite mineral  
Special Info
Type Locality 

1-2mm black crystals in Quartz.


Titanowodginite

Formula
Mn2+TiTa2O8 
Crystal System
Monoclinic 
Crystal Habit
Euhedral Crystals 
Cleavage
None, None, None 
Luster
Vitreous (Glassy) 
Color
dark brown, black 
Streak
dark brown 
Class
Monoclinic - Prismatic 
Fracture
Brittle - Irregular 
Hardness
5.5 
Collection
William & Anne Cook Collection
Special Info
Type Locality

Tundrite-(Ce)

#BAC60753
Locality
Kangerdluarssuq, Ilimaussaq, Greenland 
Formula
Na2Ce3+2TiO2SiO4(CO3)2 
Availability
Sold
Size
4 x 2.5 x 2 cm - Miniature 
Tagged
pegmatite mineral  

An excellent 1.7mm golden radiating group of crystals. There is a small one off to the side. Associated with black Aegerine. Ex. University of Copenhagen specimen with tag.


Tundrite-(Ce)

Formula
Na2Ce3+2TiO2SiO4(CO3)2 
Crystal System
Triclinic 
Crystal Habit
Acicular, Striated 
Cleavage
Perfect, None, None 
Luster
Vitreous (Glassy) 
Color
brownish yellow, greenish yellow 
Streak
white 
Class
Triclinic - Pinacoidal 
Fracture
Brittle - Splintery 
Hardness
Collection
William & Anne Cook Collection

Ulrichite

#BAC60766
Locality
Lake Boga granite quarry, Lake Boga, Victoria, Australia 
Formula
CaCu(UO2)(PO4)2·4H2
Availability
Sold
Size
3 x 2.5 x 1.5 cm - Thumbnail 
Tagged
phosphate  
Special Info
Type Locality 

Bright green bladed crystals in a group to 1mm.


Ulrichite

Formula
CaCu(UO2)(PO4)2·4H2
Crystal System
Monoclinic 
Crystal Habit
Acicular, Radial 
Cleavage
Perfect, None, None 
Luster
Vitreous (Glassy) 
Color
green, lime green 
Streak
white 
Class
Monoclinic - Prismatic 
Hardness
3.5 
Collection
William & Anne Cook Collection
Special Info
Type Locality
Mineralpedia
View Ulrichite
On Dakota Matrix
Previously Sold Ulrichite
On Dakota Matrix
Other Available Ulrichite
WebMineral
View Ulrichite
Mindat
View Ulrichite

Uytenbogaardtite

with Gold - #BAC60759
Locality
New Bullfrog mine, Nye Co., Nevada, United States 
Formula
Ag3AuS2 
Availability
Sold
Size
4 x 3 x 1 cm - Miniature 
Tagged
sulfide , silver , gold  

Dark grey pods of Uytenbogaardtite to 8mm with speckled Gold. Sawed flat on one side.


Uytenbogaardtite

Formula
Ag3AuS2 
Crystal System
Tetragonal 
Crystal Habit
Microscopic Crystals 
Luster
Metallic 
Color
gray white 
Class
Tetragonal - Trapezohedral 
Fracture
Brittle 
Hardness
Collection
William & Anne Cook Collection

Wightmanite

in Calcite - #BAC60752
Locality
Crestmore, Riverside Co., California, United States 
Formula
Mg5O(BO3)(OH)5·2H2
Availability
Sold
Size
5 x 3 x 2 cm - Miniature 
Special Info
Type Locality 

Silky white acicular crystals from 1 to 6mm and larger yellow-brown larger crystals to 6mm in blue Calcite.


Wightmanite

Formula
Mg5O(BO3)(OH)5·2H2
Crystal System
Monoclinic 
Cleavage
Perfect, Distinct, None 
Luster
Vitreous (Glassy) 
Color
colorless, light green 
Streak
white 
Class
Monoclinic - Prismatic 
Hardness
5.5 
Collection
William & Anne Cook Collection
Special Info
Type Locality

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